_________ Is Present in Both Males and Females, Can Cross

question 160

Multiple Choice

_________ is present in both males and females, can cross the blood-brain barrier to enter the central nervous system, and is used in treatment of traumatic brain injury.

• A) Progesterone.
• B) Testosterone.
• C) Serotonin.
• D) Cortisol.

---

Definitions:

Top Land

In an engine, the top land represents the highest section of the piston between the piston ring and the crown, impacting compression and efficiency.

Backlash

The play or gap between meshing gears, allowing for necessary movement without binding in mechanical systems.

Tooth Contact Pattern

Refers to the alignment and engagement between gear teeth, impacting the efficiency and noise level of the gear operation.